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Finding the Fourth Proportional to 578.86, 866.93 and 285.44

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Solution

The fourth proportional to 578.86, 866.93 and 285.44 is: 427.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.86 : 866.93 = 285.44 : x
  2. Step 2: Convert to fraction form
    578.86/866.93 = 285.44/x
  3. Step 3: Cross multiply
    578.86x = 866.93 × 285.44
  4. Step 4: Simplify right side
    578.86x = 247,455.07
  5. Step 5: Solve for x
    x = 247,455.07/578.86
  6. Step 6: Final answer
    x = 427.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.